haxtun



2 SheetsSheet 1.

W. E. HAXTUN.

DRAFT REGULATOR. No. 411.768 Patented Sept. 24, 1889.

(No Model.)

W E HAXTUN ZSheets-Sh t DRAFT REGULATOR.

Patented Sept. 24, 1889.

in connection with hot-water heating UNITED STATES PATENT QFFICE.

\VILLIAM E. HAXTUN, OF KEWANEEQILLINOIS, ASSIGNOR TO THE HAXTUN STEAM HEATER COMPANY, OF SAME PLACE.

DRAFT- REG U LATO R.

SPECIFICATION forming part of Letters Patent No. 411,768, dated September 24:, 1889.

Application filed March 8, 1889.

Fig. 2 is a front elevation. Fig. 3 is a plan view showing another arrangement of the devices. i is a detail.

This invention relates to automatic draftregulators, and is primarily designed for use pp ratus for buildings, but may be used with steam-heating apparatus.

The object of my invention is to construct a draft-regulator for controlling the dampers of the furnace, which shall be operated by the variation in the temperature of a circulatingpipe, through which hot water or steam flows from a boiler. This I accomplish as illustrated in the drawings, and hereinafter described.

That which I claim as new will be pointed out in the claim.

In the drawings, A represents the masonry of the furnace.

B is a hotafter or steam boiler set in the masonry.

C are circulating-pipes leading from the boiler B. One of these circulating-pipes at some distance from the boiler B is firmly secured at some convenient point to a solid timber D of the building by clamps d d, or by other suitable means, so that the pipe at that point is held perfectly stationary.

E is a freely-swinging lever, which is pivoted at one end on a pivot f, secured to one of the timbers F of the building by iron plates or otherwise. This lever E, near the pivot f, is pivoted on a pivot c, which, as shown in Figs. 1 and 2, is firmly secured on the cirou lating-pipe C. Y liVhen it is not convenient to attach the pivot c to the pipe 0, as shown in Figs. 1 and 2, it may be secured, as shown in Fig. 3, by means of a forked plug, (see Fig. 4,) which is secured in one end of a T-coupling.

The pivot c and the lever E are to be located Serial No. 302,551. (No model.)

chain c in such manner that it can swing horizontally freely.

G is a chain or cord connected with the outer end of the long arm of the lever E. This chain G runs over a pulley g, and is connected at its lower end with an arm la, attached to the draft-door H of the furnace, as shown in Fig. 2.

I is a second chain, which is also connected with the outer end of the long arm of the lever E. This chain I passes over a pulley i,

and is attached to the check-draft door J in the chimney of the furnace behind the boiler B, as shown in Fig. 2.

K are the return-pipes to the boiler.

The variation in the temperature of the hot water or steam passing through the circulating-pipe 0 causes it to expand or contract longitudinally according as the temperature rises or falls, moving the pivot c away from or toward the stationary point at the clamps d. 7 5

The expansion of the pipe 0 moves the lever E toward the furnace, allowing the draft-door H to close and opening the check-draft door J. The contraction of the pipe C moves the lever E away from the furnace, opening the draft- 8o door H and allowing the check-draft door-J to close. By adjusting the lever E and the lengths of the chains G and I the expansion and contraction of the circulating-pipe can be made to operate the doors, so as to regulate the temperature of the entire heating apparatus automatically. The length of the lever used will depend upon the distance of the pivot c from the stationary point at the clamps cl, as the greater the distance the greater will be the movement 6f the pivot c and the lever E. The doors H and J are to be so arranged that they can close by gravity.

The pipe O maybe any one of the circulating-pipes, orwhen the main circulating-pipes already in the building are not well adapted for the purpose a secondary pipe maybe put in, provided at a proper distance from the boiler with a T-coupling and an air-valve and a separate return-pipe.

Branch pipes may be attached to the pipe C at desired points between (Z and F, provided they are so attached as not to interfere with the movement of the pipe 0.

The leverE maybe a simple lever, as shown, or, if necessary, it may be a compound lever. The pivots c and f must fit closely, so that there will be no lost motion at those points.

Instead of securing the circulating-pipe C at the point D and allowing it to expand toward the boiler, it is evident that the fixed I furnaces, stoves, and radiators, or of tubes or bars connected therewith; but I am not aware that heretofore a valve or damper has been controlled by the expansion and contraction of a steam or hot-Water circulating pipe held stationary at some point, and a lever pivoted to said circulating-pipe'at a distance from the stationary point and connected with a draftdoor.

What I claim as new, and desire to secure by Letters Patent, is-

The combination, with a furnace, a boiler, and a hot-water or steam circulating pipe held stationary at some point, but free to expand and contract with variations in temperature of the hot water or steam that flows through said pipe from the boiler, of a freely-swingin g lever pivoted directly to said circulating-pipe at a distance from its fixed point, and a connection between said lever and'a draft-door of the furnace, substantially as described.

WILLIAM E. l-IAXTUN. Witnesses:

A. M. HEWLETT, FRED A. ELLIOTT. 

